Noh Ji Wook (Ji Chang Wook), a prosecutor, met Eun Bong Hee (Nam Ji Hyun), a 1st year judicial trainee for the first time in unexpected embarassing incident. Three months later, they meet again as a supervisor and probationer. Things getting worse when Bong Hee suddenly gets caught as a suspect for her ex-boyfriend’s murder. While she becomes a defendant and Ji Wook who is known as a harsh prosecutor, what will he do next?